Tympan



(No Model.) 2 Sheets--Sheet 1.

G. H. 'SQUIER.

- TYMPAN. v No. 340,464. Patented Apr. 20, 1886.

WITNESSES I DTVENTOR ATTORNEYS.

2 Sheets-Sheet 2.

(No Model.)

GJH. SQUIER TYMPAN.

' Patented Apr. 20, 1886.

IN'VENTOR Q M WITNBS SES Wi/am a ATTORNEYS.

UNITED TATES ATENT FFICE.

GEORGE H. SQUIER, OF TREMPEALEAU, WISCONSIN.

TYMPAN.

SPECIFICATION forming part of Letters Patent No. 340,464, dated April 20, 1886.

Application filed June 3, 1885. Serial No. 167,531. (No model.)

details and combinations of the same, as will be fully described and set forth hereinafter.

Reference is to be had to the accompanying drawings, forming a part of this specification, 1n which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of my improved tyinpan; Fig. 2, a side view of the same; Fig. 3, a side view of the tympan and the different beds; Fig. 4, an enlarged detail side view of part of the tympan, showing the mechanism for opening the clamps; Fig; 5, an enlarged detail sectional view of the tympan, showing the clamps closed Fig. 6, a similar view showing them open; Fig. 7, a cross-sectional view of the end of the frame.

The blanket A, or other-piece of fabric generally used in tyinpans, has its edges placed between strips A, which are held by pins or screws in grooves in thcinner edges of the side pieces, B, and end pieces, B, of the tympanfrarne G. The bed D is on a carriage, D, sliding on a track-plate, D", and at the end of the track two upwardly-projecting lugs, D are provided, each having in its inner side a track-groove, D, in the shape of the letter V, having a loop at its bottom. A shaft, E, is held in lugs E on the end of the bed D, and on each end of the said shaft a pulley, E is held rigidly. Hubs F are mounted to turn on the ends of the shaft E between the lugs or jaws E and the pulleys, which hubs F are formed on bars F, provided at their ends with pins carrying rollers F, which work in the track-grooves D in the lugs D The outer ends of the rods F are provided with hubs F, which are mounted to turn on pivots F*, projecting from the outer edges of the side pieces, B, of the tympan at the middle.

pulley, F is mounted, with which a ratchetwheel, F*,'is made integral, the pawl F,pivoted on the bar F, engaging withv the said ratchet-wheel, and thus permitting the said ratchet-wheel to revolve on the pivot F in one direction only. An endless cord or belt, G, is passed over the pulleys Eand F on the same side of the tympan-frame.

Clamping-strips H are held against the inner edges of the side and end pieces, B and B, above and below the blanket A. The said clamping-strips on the side pieces are secured to levers H, pivoted in pairs between jaws H on the outer edges of the said side pieces, and the said levers have their ends crossed at the pivots and the projecting ends provided with hook-arms H between which the rods I, parallel with and adjacent to the outer edges of the side pieces, pass.

Springs H*, wound on the pivots ofthe levers H, have their ends rested or secured on the outer surfaces of the said levers near the free ends, and thus press the clamping-strips H against the blanket.

I have shown four pairs of levers, H,on each side piece of the tympan, but a greater or, if

desired. a less number may be used. The rods 1 each have a wedged shaped part, I, at each pair of levers H, and springs J, surrounding the rods I and acting on them, pull the said rods from each otherthat is, from the middle of the machine. On theinner end of each 'rod a U-shaped piece, K, is fastened, the shanks of the said U-shapedpiece being at right angles to the side edges of the side pieces, B.

The clamping-strips H of the end pieces, B, are secured to the ends of wires or rods L, extending transversely over the side pieces, B, and held on the upper surface of the same by staples, or in any other suitable manner, the

outer ends of the rods being bent down and toward each other, so as to rest on the rods I, as shown in Fig. 7.

Springs L, surrounding the rods L, are secured to the outer edges of the side pieces, B, and to the rods L and serve to turn the said rods L in such a manner as to swing the clamping-strips H at the ends of the frame against the blanket. The rods I are On the outer end of each pivot F a grooved 1 provided at the ends with wedge-shaped heads M, to pass between the bent ends of the rods L, as shown in Fig. 4.. V

The sheets are placed on the table 0, and between the said table and the track-plate D" the table P is provided, and from the same the pins 1 project upward, between which the sheets are deposited. From the said table the two forks Q, project upward, the inner edges of the shanks of which are arranged V- shaped, as shown.

The operation is as follows: The impression is made on the sheet held by thetynipan when in the position shown in Fig. 3, the bed-plate D resting on the carriage D, which is on the track-plate D The carriage D slides in the direction of the arrow (1., Fig. 3. 'The rollers F on the ends of the bars F slide down the track D in the lugs D and thereby the bars F are swung in the direction of the arrow 1), Fig. 3, into the position shown in dotted lines. By swinging the tympan in the direction of the arrow 11 the pulley F is turned by the endless cord G in the direction of the arrow 0, Fig. 2. The pulley E being fixed, the cord must necessarily revolve the pulley F By the above-described movement of the pulley F the tynipan is swung in the inverse direction of the movement of the bars F in relation to said bars, and, as the tympan is raised by the bars F at the same. time that it is being turned in relation to said bars in the inverse direct-ion of the movement of the bars, it is evident that the tympan will remain in a horizontal position, and that the same surface that has been presented to the bed D will also be presented to the top of the table P- that is, the tympan is not reversed.

As the tympan swings down into the position shown in dotted lines in Fig. 3, the end lugs, 7c. of the U-shaped pieces K strike the prongs of the fork Q, whereby the said lugs k are pulled toward each other,and the bars I, with which the pieces K are connected, are moved toward each other or in the directions ofthe arrows d d, Fig. at, whereby the wedges l are pulled in between the hook ends H and separate them, causing the levers H to swing from the tympan frame and to raise the side clamping-strips H, as shown in Fig. 6. At the same time the wedge-shaped heads M are pulled between the ends of the rods L, whereby the said rods are turned on their longitudi nal axes, and the clamping strips H on the ends of the tympan are also thrown upward. The several clamping-strips are thus swung from the sheet held in the tympan, and the said sheet,which was held on the under side of the tympan, is released and permitted to drop between the rods or pins P on the table P. A fresh sheet is then passed from the table 0 upon the top of the tyinpan-that is, on the side opposite the one from which the sheet was just released. Then the carriage D is moved in the'inverse direction of the arrow a, Fig. 3, whereby the bars F are swung in the inverse direction of the arrow 1) and from the position shown in dotted lines in Fig. 3 to the position shown in full lines.

As the lugs k of the U-shaped pieces Kslide up the beveled inner edges of the prongs of the forks Q the springs J move the rods I in the inverse directions of the arrows d dthat is, from each other-whereby the wedges I M are moved from between the ends of the levers H L, permitting the springs H L to swing the said levers downward and press the clampingstrips H upon the sheet of paper that has just been placed upon the tympan, whereby the said sheet is grasped and held automatically.

As the bars F swing in the inverse direction of the arrow b,the pawls F engage with the ratchet-wheels F and prevent the pulleys F from turning in the inverse direction of the arrow 0, and thus cause the tympan to swing with the bars F-that is. the tynipan does not move in relation to the bars Fwhereby that side of the tympan which was the top when the sheet was placed upon the said ty in pan will be swung down upon the bed D, and the sheet that has been placed upon the top of the tympan during the time that the tympan was above the table P will be below the tympan, and will be brought upon the bed D when the tympan swings upon the said bed. I would state here that my tympan is designed especially for use with the well-known W'ashington hand-press, and the carriage is operated just the same as in said press. As this press is well known, a further description thereof is unnecessary. Of course the tympan could be appliedto hand cylinder-presses, sucltfor instanctqas that shown in Patent No. 3l,760. Then the carriage D again slides in the direction of the arrow a, the bars F are swung in the direction of the arrow b,and the tyinpan is turned on its pivots,in the manner above described, by the action of the pulleys and cords, so that the printed sheet will be on the under side of the tympan when the tympan is above the table P.

Having thus fully described myinvention, I claim as new and desire to secure by Letters Patent-- 1. The combination, with a tympan, ot' separate and independent paper-clamping strips at the edges and of mechanism for automatically opening the said strips, substantially as herein shown and described.

2. The combination, with a tympan, of paper-clamping strips secured on pivoted levers, springs acting on the said levers, sliding rods having wedges for swinging the levers from each other, and forked pieces for operating the said rods, substantially as herein shown and described.

3. The combination, with a tympan-frame, ofpivoted paper-clamping strips, sliding rods for swinging said strips from each other, and forks secured on the table for receiving the paper, which forks operate the said rods,substantially as herein shown and described.

forked pieces for moving therods .I, substantially as herein shown and described.

5. The combination, with a tympan-frame, of the paper-clamping strips H, the pivoted levers H, having hook ends H, the sliding rods 1, having wedge shaped parts I, the U- shaped pieces K on the inner ends of the rods I, and of the forks Q, substantially as herein shown and described.

6. The combination, with a tympan-frame, of the clamping-stripsH at the sides and ends, the pivoted levers H, secured to the side strips Hand having hooks H the sliding rods I, having the wedge-shaped pieces I and the wedge-shaped heads M at the ends, springs acting on the rods I, the rods L. secured to the end strips H, and the springs L, surrounding and acting on the rods L, substantially as herein shown and described.

7. The combination, with the track-plate, of the sliding carriage on the same, the plate or bed on the carriage, and a ty-mpan-frame held bet ween bars pivoted on the bed plate, and carrying pins which pass into cam-tracks in lugs projecting from the track-plate, substantially as herein shown and described.

8. The combination, with the track-plate, of a carriage on the same, a bed-plate on the carriage, a tympanframe pivoted between bars pivoted on the bed-plate, pins carrying rollers on the ends of the said bars, and of the jaws D having looped V-shaped cam-tracks D, substantially as herein shown and described.

9. The combination, with asliding carriage, ofa bed-plate on the same, bars mounted to turn on the bedplate, a tympan-frame pivoted between the bars, pieces having cam-tracks acting on the opposite ends of the bars, pulleys on the pivots of the tympan-frame, fixed pulleys on the bars between which the tympan-frame is pivoted, and of the endless belts passing around the pulleys on each side'of the tympan-frame, substantially as herein shown and described.

10. Thecombination,withasliding carriage,

of a bed-plate on the same, bars pivoted to the bed-plate, a tympan-frame pivoted between the bars, pins carrying rollers on the ends of the bars opposite those towhich the tymp anframe is pivoted, pieces having cam-tracks in which the rollers on the pins run, pulleys on the pivots of the tympan-frame, fixed pulleys on the bars between which the tympan-frame is pivoted, belts passed over the pulleys on each side of the frame,ratchet-wheels on the pulleys on the pivots of the tympan-frame, and of pawls pivoted to the bars between which the tympan-frame is pivoted, the said pawls engaging with the ratchet-wheels formed on the pulleys on the pivots of the tympan frame, substantially as herein shown and described.

11. In a printing-press, the combination, with a sliding carriage and tracks therefor, of bars pivoted to opposite sides of the carriage near their forward ends, a tympan pivoted centrally between the rear ends of the said bars, a cam acting on the forward ends of the bars to swing the same, and mechanism, substantially as described, for swinging the tympan automatically in relation to the bars when said bars swing in one direction, and holding the tympan fixed in relation to the bars when said bars swing in the opposite direction. sub-v stantially as and for the purpose set forth.

12. The combination, with a tympan-frame having paper'clamping springs on both surfaces, of-the sheet or blanket held in the frame, bars between which the tympan-frame is pivoted, mechanism, substantially as described, for reversing the tympan in relation to the bars when the bars swing in one direction, and for holding the tympan fixed in relation to the bars when the said bars swing in the opposite direction, forks on the table on which the paper is deposited, sliding rods on the tympan -frame for actuating the clampingpie'ces, and of U-shaped pieces on the sliding rods, which U-shaped pieces are engaged with the forks, for the purpose of automatically grasping and clamping or releasing the sheet, substantially as herein shown and described.

- GEORGE H. SQUIER.

, Witnesses:

J AMES SQUIER, WILLIAM P. HUSTON. 

